Apparently, your last name doesn't change if you're an Icelander. I know a married couple with different last names. I can't recall how the kids' surname is chosen.
*resists making a joke that probably ought to be pulled*
Umm... stand-in joke... umm...
Okay, so comedy isn't my strong suit. ImOpen says: "Strong means weak." Oh yeah? Well, "Weak means strong." So "Strong means weak means strong."
So there. Nyah.